How do you factor 49x^2-4y^2?

Apr 3, 2018

$\left(7 x - 4 y\right) \left(7 x + 4 y\right)$

Explanation:

Difference of two squares $\sqrt{49 {x}^{2}}$ is $7 x$ and the $\sqrt{4 {y}^{2}}$ is $2 y$